fix #625

Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
 
@@ -16,6 +17,8 @@ namespace YooAsset
 
         private static readonly List<AsyncOperationBase> _operations = new List<AsyncOperationBase>(1000);
         private static readonly List<AsyncOperationBase> _newList = new List<AsyncOperationBase>(1000);
+        private static Action<string, AsyncOperationBase> _startCallback = null;
+        private static Action<string, AsyncOperationBase> _finishCallback = null;
 
         // 计时器相关
         private static Stopwatch _watch;
@@ -58,7 +61,12 @@ namespace YooAsset
             {
                 var operation = _operations[i];
                 if (operation.IsFinish)
+                {
                     _operations.RemoveAt(i);
+
+                    if (_finishCallback != null)
+                        _finishCallback.Invoke(operation.PackageName, operation);
+                }
             }
 
             // 添加新增的异步操作
@@ -105,6 +113,8 @@ namespace YooAsset
         {
             _operations.Clear();
             _newList.Clear();
+            _startCallback = null;
+            _finishCallback = null;
             _watch = null;
             _frameTime = 0;
             MaxTimeSlice = long.MaxValue;
@@ -142,6 +152,25 @@ namespace YooAsset
             _newList.Add(operation);
             operation.SetPackageName(packageName);
             operation.StartOperation();
+
+            if (_startCallback != null)
+                _startCallback.Invoke(packageName, operation);
+        }
+
+        /// <summary>
+        /// 监听任务开始
+        /// </summary>
+        public static void RegisterStartCallback(Action<string, AsyncOperationBase> callback)
+        {
+            _startCallback = callback;
+        }
+
+        /// <summary>
+        /// 监听任务结束
+        /// </summary>
+        public static void RegisterFinishCallback(Action<string, AsyncOperationBase> callback)
+        {
+            _finishCallback = callback;
         }
 
         #region 调试信息